SHERLOCK Season 4 debuts first trailer at Comic-Con

Promising laughter, tears, shocks, surprises and extraordinary cases, it was announced previously that series four will begin – with the nation’s favourite detective, the mercurial Sherlock Holmes, back once more on British soil – as Doctor Watson and his wife, Mary, prepare for their biggest ever challenge – becoming parents for the first time.

Sherlock: The Abominable Bride was the most watched program over the festive season with 11.6 million viewers and the highest-ever audience share for a Sherlock episode. The Victorian special was also released in thousands of theaters around the world to complement the TV broadcast.

Sherlock is written and created by Steven Moffat and Mark Gatiss, and inspired by the works of Sir Arthur Conan Doyle. Sherlock is produced by Sue Vertue, and the executive producers are Beryl Vertue, Mark Gatiss and Steven Moffat for Hartswood Films, Bethan Jones for BBC Cymru Wales and Rebecca Eaton for Masterpiece. It is distributed internationally by BBC Worldwide.